import fs, { write } from 'fs';
fs.writeFile('./bbb.txt', 'hello world', {
    encoding: 'utf-8',
    flag: 'a+'
}, (err) => {
    console.log('写入文件结果：', err);
});

const writeStream = fs.createWriteStream('./ccc.txt', { flags: 'a' });

writeStream.on('open', (fd) => {
    console.log('文件被打开', fd);
});
writeStream.write('coderwhy');
writeStream.write('aaaa');
writeStream.write('bbbb', (err) => {
    console.log("写入完成：", err);
});
writeStream.on('finish', () => {
    console.log('写入完成了');
});
writeStream.on('close', () => {
    console.log('文件被关闭~');
});
writeStream.end('哈哈哈哈');